Thread: A/C modified: ETR-switch from Maytag
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Old 09-01-2006, 11:17 PM
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jbaj007 jbaj007 is offline
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A/C modified: ETR-switch from Maytag
I'm using the MB service manual terminology, instead of WorldPac, to descibe a substitute for the ETR-switch on 123 and early 126(81-85). The one that disconnects the compressor when the evaporator nears freezing.

The problem with many ETR is that it's set way too high thru over-caution by MB or just old age on our cars; 38ºF is not uncommon. While I was adjusting my ETR (which is a pain to do) I noticed the similarity of the RANCO (a major manufacturer in controls) ETR from Mercedes with the General Electric thermostat I'd just replaced in my refrigerator.

Pic #1. Ranco ETR from Mercedes (difficult to adjust, done by very few)
Pic#2. My refrigerator
Pic#3. General Electric ADJUSTABLE thermostat (ne. ETR )
Pic#4 After testing in ice water and set for 32º wired in for test runs.
Pic #5 Industrial strength ETR
Attached Thumbnails
A/C modified: ETR-switch from Maytag-dcp_0701s.jpg   A/C modified: ETR-switch from Maytag-dcp_0698s.jpg   A/C modified: ETR-switch from Maytag-dcp_0694s.jpg   A/C modified: ETR-switch from Maytag-dcp_0699s.jpg   A/C modified: ETR-switch from Maytag-dcp_0702s.jpg  

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